In 2009, the City of Calgary became one of the last major Canadian cities to implement a mandatory curbside recycling program. During the first three full years of the program, which is available to over 300,000 single-family households, the amount of material collected was fairly consistent. Then something changed. Calgary's single-stream recycling collection program is now in its sixth year of operation and is experiencing declining tonnages. Specifically, the weight of marketed recyclables collected has decreased from 58,000 metric tons in 2010 (the first full year of program operation) to slightly less than 53,000 metric tons in 2013. Information for 2014 to date shows that the downward trend appears to be continuing.
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